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21594 (1998 VP31)
Classification: Main-belt Asteroid          SPK-ID: 2021594
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459396.5 (2021-Jul-01.0) TDB
Reference: JPL 36 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .2138652738979069 2.1716e-08  
a 2.738727210731032 9.8229e-09 au
q 2.153008565676389 5.8799e-08 au
i 8.231914517871937 3.7769e-07 deg
node 242.8851196977936 6.3568e-06 deg
peri 351.3050551294561 9.7527e-06 deg
M 150.6627132205778 5.3465e-06 deg
tp 2458703.672886226189
(2019-Aug-08.17288623)
2.2663e-05 TDB
period 1655.471056023077
4.53
8.9065e-06
2.438e-08
d
yr
n .2174607636238744 1.1699e-09 deg/d
Q 3.324445855785675 1.1924e-08 au
  Orbit Determination Parameters
   # obs. used (total)      2198  
   data-arc span      12409 days (33.97 yr)  
   first obs. used      1987-02-22  
   last obs. used      2021-02-12  
   planetary ephem.      DE441  
   SB-pert. ephem.      SB441-N16  
   condition code      0  
   norm. resid. RMS      .46661  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Jul-08 18:35:17  

Additional Information
 Earth MOID = 1.14244 au 
 Jupiter MOID = 1.68919 au 
 T_jup = 3.303 
[ show covariance matrix ]

Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 13.33   n/a MPCxxxxx  
diameter diameter 9.825 km 0.034 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2014ApJ...791..121M)  
rotation period rot_per 5.5865 h n/a LCDB (Rev. 2020-October); Warner et al., 2009 Result based on less than full coverage, so that the period may be wrong by 30 percent or so.
Published Reference List:
[Albers, K.; Kragh, K.; Monnier, A.; Pligge, Z.; et al. (2010) Minor Planet Bull. 37, 152-158.]
[Pal, A.; Szakats, R.; Kiss, C.; Bodi, A.; et al. (2019) Ap. J. Supl. Ser. 247, id.26.]
geometric albedo albedo 0.118   0.002 urn:nasa:pds:neowise_diameters_albedos::2.0[mainbelt] (http://adsabs.harvard.edu/abs/2011ApJ...741...68M)  

21594 (1998 VP31)          Discovered 1998-Nov-13 by Korlevic, K. at Visnjan
Reference: 20010208/Numbers.arcLast Updated: 2004-04-19

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Alternate Designations
 1998 VP31 = 1987 DO1 = 1999 XU214 
Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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